Electric switch



March 5, 1929. R.H. CUNNINGHAM 1,704,176

LECTRIC SWITCH Filed July 15, 1927 ary switch contacts are resilient and are engaged by the movable switch member with a wiping action which secures a proper electrical connection and keeps the contacts clean and free from accumulations. The upper ends 16 of the stationary switch contacts are bent outwardly slightly to provide a daring entrance and prevent the swinging switch member from striking the end edges of the stationary switch contacts. The swinging switch member 15 consists of an approximately inverted yoke composed of spaced sides and a connecting transverse portion 17 which is depressed at the centerto form loop shaped extensions 18 which engage at their outer sides with the stationary switch contacts. The transverse connecting portion 1'? is provided with a central guide opening 19 in which slides the upper end oi a pin or red 20 mounted at its lower end in a perforation '21 of a rocking plate'Q and provided at its lower end' with a stop collar 21 arranged upon the rocking plate. The rockii'ig plate 22 is provided at its ends with journals 23 mounted in open hearings of a push slide 25 which shifts the position of the rocking plate to move the lower end 01 the same and a coiled spring 26 to opposite sides of the center or axis of the swinging switcn member for causing the switch tosnap. The sides of the swinging switch uember are provided with pivots: or journals 2? which are preferably formed integral with the said sides of rigidlyconnected therewith; T he pivots or journals extend inwardly from the sides of the swinging switch member and are mounted in bearing openings 28 of the lined support 18. The lined support 13 consists of an open box or casing constructed 0t sheet metal or other suitable material and composed eta bottonn side and end l the side wallsbeiug prcvided with ecu iy arran ed upwardly projecting ears 29 having the bearing openings The said side walls are also provided at their ends with upwardly extending arms 30 having laterally projecting outwardly extending teru'iinal stop lugs 81 formed by,

bending); the arms at right angles and arranged to limit the swinging movement OT the movable switch inemi swinging switch member is in its circuit closing position in engagement with the stalYhcu the lionary switch COTllflClIS lllQ said member is also in engagementwith one pair of the stop lugs 31 and when the swi ngin' switch member moved to its upper position it is in contact with the other pair of stop lugs 31,.

The push slide consists of a channd bar composed of a bottom and side flanges which are provided with central rectangular e7:- tensions 32 having theibearingsQl and ver tical entrance slots 25. The bottom of the push slide is provided with spaced depending lugs 33 formed integral withthe said; bottom y bending portio'nsof the samedownwardly and extending across the bottom and adapted to engage the end walls 3lof the lixed'support 13which forms a guide for the push slide.- The push slide rests upon the upper edges of the end walls and slides betweenthe side Walls and is limited in its movement by the engagement of transverse lugs 33 with the said end walls 84. The push slide is equipped at its ends with insulating knobs or buttons 35 of molded bakelite or other suitable material. One ot' the push bottons 35 is designed to be red and and the other of black or some contrasting color for indicating readily when the switch on or off. The solid section l' of the casing is provided with a transverse groove or space 86 to receive the push slide audithas trans versely aligned recesses 37 torining side openings through which the push buttons 35 extend and operate. The movement of the push slide in carrying the spring 26 from one side or he center or pivot of the movable switch member to the other compresses the spring and causes the movable switch member to spring or snap into on and oil position.- The lined support is rigidly secured to the section l by the screws 1 which pierce t-he'bottoin ot the fixed support and engage the metal bushings l2.

The sections 1 and 2 are secured together by screws 38 having their heads countersunk in openings 39 of the section 1 and their threaded portions engaged with metal bushings 40 embedded in solid portions of the cap or shell section 2 ol the casing.

i i hat is claimed is: v

l. Aneleetric switch including an insulating casing, spaced stationary switch contacts, a, transversely disposed support hired to the casing and having spaced side and end walls, the side walls being extended above the end walls, a push slide arranged to slideupon the end walls above the bottom of the support and guidedbetween the side wallsio'l thel'ixed support and. provided with depending means projecting into the sup porttrom the slide towards the bottom of the support and operatin betw GI1 the end walls and arranged to engage the end walls tolimit the sliding movement Oil the push slidey a swingingswitch member pivotally mounted on the support and movable to and from the stationary contacts, and resilient means connecting the push slide with the swinging switch member and arranged to be carried to opposite sides of the pivotof the-swinging switch member to cause the same to snap or swing into and out of en fit) support and provided with spaced lugs formcdby bending the metal oi the slide and which project from the slide towards the bot-. tom of the support, and adapted to engage with the inner races of the end walls of the support to limit the movei'nent of the push slide, and yieldable means for connecting the push slide with the swinging switch member.

3. An electric switch including an insulating casing, spaced stationary switch contacts,

with the same to limit the movement of the slide, a swinging switch member pivoted on the support and movable to and from said contacts, arocking plate pivotally mounted in the open bearings of the extensions of the slide, a pin supported at its lower end in the rocking plate and slidable in the swinging switch member, and a coiled spring disposer on the pin and interposed between the swinging switch member and the rocking plate.

l. An electric switch including an insulating casing, spaced stationary switch termin als mounted within the casing, a transversely disposed support fixed to the casing and composed of a. bottom, side and end walls, the side walls being extended above the end walls and provided with central bearings and terminal arms having outwardly extending laterally projecting lugs, a swingingswitch member consisting of an inverted yoke com- )osed of saaced sides and a connectin to.)v

portion, the sides being provided at their lower ends with inwardly extending pivots fitting in the bearings of the fixed support, and the transverse top portion being d pressed to form. loop extensionsand provid ed with a central opening, a push slide guid ed between the sides of the support and arranged upon the end walls thereof and composed of a channel. her having depend ng integral transverse lugs operating between the end walls ol' the fixed support and arranged to engage the same, said push slide being provided with centrally arranged side exten-r sions having open bearings, a'roclnng plate arranged between the extensions and having journals mounted in the open bearings thereof, said rocking plate being provided with a perforation, a pin mounted at one end in the perforation of the rocking plate and guided at its upper end in the opening of the transverse portion of the yoke, and a coiled spring disposed on the pin and interposed between the transverse portion of the yoke and the rocking plate.

5. An electric switch including an insulating casing, a pair of terminal binding screws arranged'at each end of the casing, switch mechanism for electrically connecting one member of each pair of binding screws and for breaking the electrical connection between the same, and a busbar embedded in the 111'- sulating material ofthe casing,-and forming a permanent continuouselectrical connection between such bindlng screws, said binding screws permitting lJOtlLVIIGS'Of an electric cord to be severed and t-he'terminals of the wires of the severed portions attached to the switch.

6. An electric switch including an insulating casing, spaced switch contacts, a. support fixed to the casing, a push slide arranged to slide upon the support in spaced relation to the bottom of the support and provided with means intermediate the ends of the sameand pro3ect1ng'1nto the support toward the bottom of the support and terminatin hort of the bottom of the latter and adaped to engage portions ot the support to limit the sliding movement of the slide, a switch member swingingly connected to said support and movable to and from said contacts, and means connecting the push slide and the switch memher and arranged to be carried to opposite sides of the point of swinging connection of the switch member to the support to cause the latter to snap into and out of engagement with sand switch contacts.

, In testimony whereof Ihave hereunto set my hand. I:

noY HERBERT CUNNINGHAM. 

